A ti project means tenant improvement, usually a shelled space that is built out after the main project is complete and they have acquired more funds. I also don't want to hijack but what I want to know is why would you want to turn the sensor off? I understand you are being instructed to do so but what is the advantage to turning off the sensor head? If I'm not mistaken the sensors are what they call intelligent and can learn patterns and adjust themselves and whatever else I don't know. But if you install the power pack so that the switch turns the sensor on and off it would reset evertime you flip the switch.
As for wiring it, it depends on the manufacturer but the ones we're doing now have blue contact wires so to wire it per spec you would hook the switch leg from the light switch to one blue and the black, then hook the remaining blue to the fixture whip. The other way is to hook line power into the room to the blue and black and the remaining blue to the line down to the switch, leaving the switch leg from the switch going to the fixtures as usual. I hope this helps and if anyone has a reason to do it a certain way I'd like to hear your reasons why.